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Nebula
A nebula is a giant cloud of gas (mostly hydrogen and helium) and cosmic dust situated between stars in the interstellar medium. Nebulae serve as sites of stellar birth and death—including emission nebulae that glow from ionized gas, reflection nebulae that scatter starlight, and dark nebulae that obscure background stars.
Source: science.nasa.gov
APODs including "Nebula"
The Large Cloud of Magellan
05/09/2019
The Spider Nebula in Infrared
04/09/2019
Spitzer's Orion
31/08/2019
NGC 7129 and NGC 7142
30/08/2019
M27: Not a Comet
29/08/2019
Dark Dust and Colorful Clouds near Antares
27/08/2019
NGC 2170: Angel Nebula Still Life
26/08/2019
NGC 1499: The California Nebula
23/08/2019
The Orion You Can Almost See
21/08/2019
1901 Photograph: The Orion Nebula
17/08/2019
The Elephant's Trunk Nebula in Cepheus
16/08/2019
Supernova Cannon Expels Pulsar J0002
13/08/2019
M16 Close Up
10/08/2019
Chamaeleon II Dark Cloud
02/08/2019
IC 1795: The Fishhead Nebula
31/07/2019
Star Forming Region NGC 3582 without Stars
30/07/2019
The North America Nebula in Infrared
28/07/2019
Cygnus Skyscape
25/07/2019
Magellanic Galaxy NGC 55
12/07/2019
The Ghost of Jupiter's Halo
11/07/2019
Carina Nebula Panorama from Hubble
23/06/2019
The Cave Nebula in Infrared from Spitzer
11/06/2019
The Planet and the Pipe
07/06/2019
The Interstellar Clouds of Orion
05/06/2019
Lynds Dark Nebula 1251
31/05/2019
Stars, Dust, and Gas near NGC 3572
28/05/2019
Deep Field: Nebulae of Sagittarius
21/05/2019
RS Puppis
17/05/2019
Young Star Cluster Trumpler 14 from Hubble
14/05/2019
Rho Ophiuchi Wide Field
13/05/2019